Bond Angles

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Which of the following is closest to the bond angle of an sp2-hybridized carbon atom?

A. 180o

B. 140o

C. 120o

D. 110o

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Correct Answer: C.120o

An sp2-hybridized carbon has a trigonal planar geometry. This means that the bond angle will be 120o, so answer choice C is the best choice. An sp-hybridized carbon has a linear geometry, meaning a bond angle of 180o. Finally, an sp3-hybridized carbon has a tetrahedral geometry with bond angles of 109.5o.

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